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(No Model.) 3 Sheets-Sheet 1.

H. BREER. DESIGGATING APPARATUS.

Patented Sept. 22, 1885.,

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(No Model.) A 3 Sheets-Sheet 2. H. BREER. DESIUUATING APPARATUS.

Patented Sept. 22, 1885.

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(No Model.) 3 Sheets-Sheet 3. H. BR'EER.

DESIGGATING APPARATUS.

Patented Sept. 22, 1885.

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HENRY 'BREER, OF DE WITT, NEYV YORK, ASSIGNOR TO CAROLINE I-I. BREER, OF SAME PLACE.

DESICCATING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 326,842, dated September 22, 1885.

Application filed November 7, 1884. (No model.)

To all whom it may concern:

Be it known that I, HENRY BREER, of De Witt, in the county of Onondaga, in the State of New York, have invented new and useful Improvements in Desiccating Apparatus, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

This invention has reference to the class of desiccating apparatus designed for converting animal matter into dry fertilizing material, and relates more particularly to the apparatus for which I have now pending an application for Letters Patent, Serial N 0. 139,972, filed August 7, 1884, in which apparatus the desiccation of the substance under treatment is effected by the passage through the desiccatingcylinder of air previously heated in its passage through a jacket surrounding the desiccating-cylinder and enveloped in the products of combustion.

The object of my present invention is to more effectually heat the air employed for de iccating the substance under treatment, and to render the apparatus more efficient in other respects; and to that end my invention consists in the peculiar construction and combination of parts hereinafter fully described, and specifically set forth in the claims.

In the annexed drawings, Figure I is a vertical longitudinal section of my improved desiccating apparatus. Fig. II is a vertical transverse section on line 1 1. Figs. lII, IV, and V are horizontal sections taken, respectively, on lines 2 2, 3 3, and 4 4, Fig. I; and Fig. VI is a vertical transverse section on line 5 5, Fig. I.

Similar letters of reference indicate corresponding parts.

B represents the combustion-chamber, communicating at one end with the firebox A,and provided at the opposite end with the exit-flue or chimney F.

Longitudinally in the combustion-chamber B is arranged the desiccating-cylinder O, which is journaled in suitable boxes or bearings in the end Walls of the combustion-chamber, and has affixed to the outer end of one of its journals a pulley or gear-wheel, G, by which to transmit rotary motion to the cylinder 0.

Around the exterior of the cylinder 0 is formed an air-jacket, D, consisting of a stationary horizontal cylinder,which is of sufficient] y greater circumference than the cylinder 0 to leave a space between them for the circulation of air admitted thereto, as hereinafter de- L scribed. The space between the aforesaid two cylinders is closed at one end and open at the opposite end. At this open end an apron, b, is suspended from the upper part of the airjacket cylinder and extended part Way down over the end of the desiccating-cylinder O, to compel the air-current to pass toward the center of the latter cylinder, as indicated by arrows in Fig. I of the drawings. A flue, H, connected to the apparatus at the opposite end of the cylinder, allows the hot air and moisture to escape from the desiccating-cylinder O.

A chute, I, at the side of the flue H affords the necessary means for introducing into the desiccating-cylinder the substance to be treated.

Underneath the air-jacket D the combustion-chamber B is provided with a horizontal partition, 0, and by vertical partitions d d under the partition 0, and extended alternately from opposite ends of the combustion-chamber nearly the length thereof, a sinuous or tortuous flue, K, is formed, passing around alternate ends of said partitions, as best seen in Fig. IV of the drawings. Said flue communicates at one end with the firebox or furnace A by another flue, K, which is made circuitous, so as to prevent the products of combustion from entering the flue K at too high temperature, and thus protect the air-duct L, arranged in the aforesaid flue, as hereinafter described. The opposite end of the flue K communicates with the compartment of the combustion-chamber B above the partition 0, as shown at d, Fig. III of the drawings, and by vertical partitions e e in the aforesaid compartment of the combustion-chamber the products of combustion are caused to circulate in a sinuous course lengthwise and underneath the air-jacket D, as represented by arrows in Fig. III of the drawings, and thence up, as shown by arrows in Fig. II of the drawings, and along the upper portion of the air-jacket to the exit-flue or chimney F, the air-jacket being thus surrounded by and effectually heated by the products of combustion.

L represents an air duct or pipe arranged within the tortuous flue K, and having one end communicating with the air surrounding the exterior of the apparatus, and the opposite end communicating with the interior of the air-jacket D, preferably at the bottom of one end thereof, as shown at L in Figs. I, II, and III of the drawings.

The air enters and circulates through the duct L, and thence passes into the air-jacket D, as represented by arrows in Figs. I, II, III, and IV of the drawings, and in its said circulation through the duct L and through the jacket D said air becomes thoroughly heated. This heated air enters the interior of the desiccating-cylinder O at' one end and leaves the same at the opposite end thereof. In passing through said cylinder it absorbs the moisture from the substance under treatment, and escapes in the form of vapor through the flue H, connected .to the end of the apparatus,ashereinbefore described.

From the side of the cylinder 0 project radially inward a series of tubular studs, a a, which are closed at their inner ends and communicate at their outer ends with the airjacket D, so as to allow the heated air to enter said studs and heat the same. During the revolution of the desiccating-cylinder O theheated studs a a pass through the substance under treatment, and thereby subject the same to increased heating-surfaces, and at the same time agitate and stir up the same.

b I) represent barbed wires or metal bars provided with stiff barbs, which bars are extended across the interior of the desiccating cylinder 0, the barbs of said bars serving to more effectually cut up the substance under treatment.

E denotes a fan-blower, the suction-pipe f of which communicates with the flue H, as shown in Fig. I of the drawings. The discharge-pipe g of said blower is extended in a tortuous course and in proximity to the bottom of the combustion-chamber B, and terminates underneath the grate of the fire-box A. When the apparatus is in operation, the blower E draws from the flue H the vapor emitted from the substance under treatment, and forces said vapor through the grate and into the fire of the fire-box A, the proximity of the pipe 9 to the combustion-chamber serving to prevent condensation of the vapor in transit to the fire-box. By said arrangement I am enabled to'destroy the unpleasant odor which usually arises from the process of desiccating animal matter.

Having described my invention,whatI claim as new is- 1. In combination with the fire-box, combustion-chamber, desiccati n g-cyli nder, and the air-jacket surrounding said cylinder, a horizontal partition in the combustion-chamber below the air-jacket, a sinuous flue underneath the horizontal partition and communicating with the fire-box, and with the combustionchamber above said partition, and air-ducts extended through the aforesaid sinuous flues and communicating with the air-jaoket, substantially as set forth and shown.

2. In combination with the combustionchamber B. desiccating-cylinder G, and airjacket D, surrounding said cylinder, the tubular studs a a, closed at their inner ends and communicating at their outer ends with theairjacket. substantially as described and shown.

3. The combinatiomwith the rotary desiccating-cylinder, of rods extended across the interior of the said cylinder and barbs pro- 

